/*
 * @Descripttion:
 * @version:
 * @Author: LiLin7
 * @Date: 2021-04-05 20:30:17
 * @LastEditors: LiLin7
 * @LastEditTime: 2021-04-05 20:46:28
 */
let count = 100;
document.getElementById('app1').addEventListener('click', function () {
  this.textContent = count++;
}, false);